Machine and needle components
The spring on the bobbin case used to regulate lower-thread tension.
Also known as
bobbin tension spring
Translations
| DE | Fadenspannungsfeder der Spulenkapsel |
| FR | Ressort de tension de canette |
| ES | Muelle de tensión de la bobina |
| IT | Molla di tensione della bobina |
| CN | 梭壳张力弹簧 |
| VN | Lò xo căng chỉ suốt |